I bought this like saturday, came home, put it on, and have been having some problems, have shot in AF mostly, but when i turn on both the camera and the flash, it takes probably 3 minutes before the light turns red, i take one picture, another 5minutes or wtv, maybe a bit shorter or longer, depending on my luck, then same thing. Lately it has also as soon as i turn it on the display begins to dim until i cant see it and flash is unresponsive, its VERY frustrating, am i doinig something wrong?

Yes, it certainly sounds like dead batteries. That's always the first thing to check anyway.

In case you didn't know, some rechargeable batteries will drain, even when not using them. NiMH, for example, are bad for this. So always charge them fresh before you need to use them.
There is a new type of NiMH. They are low discharge, so they will hold their charge much longer. The Eneloops mentioned above are in this category.